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Connecting ethernet cable to ethernet port of a router instead of to its wan port

Posted on 2007-03-17
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Last Modified: 2010-04-17
If I accidently connect the ethernet cable of the cable modem to the ethernet(Lan) port instead of the wan port of the router[DGL 4300] would it lead to malfunction in the router or will it not?
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Question by:SALEM586
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b0lsc0tt earned 150 total points
ID: 18740584
If you mean damage the router, putting the cable from the modem in the wrong port should not do that.  However the router will not function correctly (routing traffic, NAT, etc) with the modem plugged into the wrong port.  In other words no permanent damage done but you do need to correct it.

Let me know if you have a question or need more information.

bol
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by:jburgaard
ID: 18740587
Yes, that is not good.
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by:rindi
rindi earned 50 total points
ID: 18740588
The router will keep on working, but it won't have the correct setup to provide the connected PC's with internet access. Also, both of the devices, the router and the modem will be inside the same lan and both would be acting as dhcp server to the PC's. This causes an undefined situation. But nothing will break.
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by:SALEM586
ID: 18740603
For  more clarification that is if I put the ethernet cable back to the wan port of the router the router will function properly provided if every thing esle is okay

Salem 586
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by:b0lsc0tt
ID: 18740628
>> if I put the ethernet cable back to the wan port of the router the router will function properly provided if every thing esle is okay

Correct!

bol
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Author Comment

by:SALEM586
ID: 18740662
Woh! very swift response. I wish some of my previous questions were answered like this.
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by:b0lsc0tt
ID: 18740681
I'm glad that I could help.  Thank you for the grade, the points and the fun question.

bol
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Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.

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